The phrase "a stepwise reduction in" is correct and usable in written English.
It can be used in contexts where you are describing a gradual decrease or decline in a particular variable or measurement.
Example: "The study showed a stepwise reduction in blood pressure levels over the course of the treatment."
Alternatives: "a gradual decrease in" or "a progressive reduction in".
The effect of buoyancy forces on laminar heat transfer inside a variable width plate-fin heat sink is numerically analyzed: the configuration under investigation comprises an array of rectangular fins, the number of which is doubled at the streamwise middle length of the plate, leading to a stepwise reduction in the respective channel width and hydraulic diameter.
In a meta-analysis of these eight studies, we found a stepwise reduction in breast cancer risk with increasing soy intake.
The method proceeds by a stepwise reduction in the number of complexes, defined as the left and right-hand sides of the reactions in the network.
A new voluntary agreement on sodium reduction between the Dutch Ministry of Health, food industry and caterers include a stepwise reduction in sodium levels.
Kinetic analyses of Arg8-modified peptides verified a stepwise reduction in acetylation from the native substrate to the monomethylated, dimethylated, and deiminated forms.
Figure 3a demonstrates that a stepwise reduction in bath temperature from 37 to 27°C resulted in a maximal increase in force of contraction to 167.5 ± 23.0% (P < 0.05 vs. 37°C, n = 16).
Specifically, we demonstrate a dramatic stepwise reduction in CNFD, CNFL, and CNBD with an increase in TC using the latest third-generation IVCCM in diabetic patients with increasing severity of neuropathy compared with control subjects.
A clear stepwise reduction in mature miR-133a expression was observed across the three clinical groups.
On the other hand a noticeable stepwise reduction in blood glucose was observed in all treatment groups until the end of the study.
This method proceeds by a simple stepwise reduction in the number of 'complexes', which are defined as the left and right-hand sides of the reactions in the network.
Nevertheless, for simplicity, we model the apparent reduction in risk behaviour as a stepwise reduction, estimated to be a factor of 2.6 in the average number of sexual partnerships per year applied across all age groups occurring in 1997.
